Loom to weave venetian blind tape



Dec. 31, 19435. E. R. HOLMES LOOM T0 WEAVE VENETIAN BLIND TAPE Filed April 1o, 1935 l 5 sheets-sheet 2 FTx FLj tk FT CT Inventor Ubvrd e, R. Hohnes v ttor-eye Dec. 31, 1935, E. R. HOLMES 2,025,866

LOOM TO WEAVE VENETIAN BLIND TAPE Filed April 1o, 1935 3 Sheets-sheet 1 Inventor Enwmge R. Hohnes WAY www4;

US01-heya Dec. 3.1, 1935. E. R. HOLMES 2,025,866

LOOM TO WEAVE VENETIAN BLIND TAPE Filed Apri 1 10, 1935 5 Sheets-Sheet 5 Bof.. Shed Invntur \F \bridge RMoh'nes l A btorneg Patented Dec. 31, 1935 UNITED STATES LOOM TO WEAVE VENETIAN BLIND TAPE Elbridge R.. Holmes, Worcester, Mass., assigner to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts Application April 10, 1935, Serial No. 15,617 15 claims. (cl. 13e- 20)l This invention relates to improvements in looms in weaving double fabrics which are connected by strands of warp threads. Such fabrics may be used in the manufacture of so-called Venetian blinds and are the means by which the several wooden slats or strips are supported.

Looms of the type specified usually have two sets of ground warps for two spaced ground webs which may have embedded in them connecting warp threads that pass at regular intervals from one web to the other. It is frequently desirable to be able to vary the length of theconnecting or crossing warps for the purpose of accommodating wooden strips of different widths, but thel l5 loom on which the fabric is woven will ordinarily have the upper and lower decks of shuttles located at fixed distances apart, thereby rendering adjustment of the shuttles diicult. It is an important object of my present invention to provide arod or the like which is carried by the lay and is effective when inserted between the two sets of ground Warps but into the shed of the connecting warps to draw off the desired amount of crossing warp threads so that when the fabric is taken out of the loom the Webs may be spaced the proper distance. The rod orits equivalent will be in advance of the reed and so supported that its distance from the reed can be varied to draw off a greater or lesser amount of the crossing warps at the time of beat-up.

It is desirable to keep the web connecting warp is a further object of my invention to provide a 3 feed control or thelike for the crossing yarns which shall be operated at regular intervals tov slacken these warps on those beats when the aforesaid bar or rod is in drawing-off position. The slackener may be controlled in any one of several ways, as by a counter to keep track of the picks which occur between the beats of the loom when the connecting warps form sheds with each other.

While the invention is shown herein as parv ticularly related to a narrow ware loom for weaving webs or tapes, yet certain features of my invention are not limited to such a loom and can be employedto overcome any diiculty which is found to exist in double fabric looms. In the latter type of looms, more particularly the carpet type, when a tuft forming yarn is to pass from the top to the bottom web it'will ordinarily cross the plane of the corresponding warp thread which is to pass from-the bottom web'to the top at a point considerably behind the fells of the webs being woven. As a. result the lling from the shuttle, being drawn from the selvage,` must` extend rearwardly to the intersection of the planes of the crossing pile yarns before it can i with racks not shown .on the shuttles.

time of beat-up' there is formed a small loop which results in a poor selvage and lowers the price of the fabric. By the use of my present invention the crossing threads can be so controlled that the aforesaid loops are eliminated, and this 5 is equally true of narrow ware looms.

`With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth 10 in the claims.

In the accompanying drawings, wherein a convenient embodiment of my vinvention is set forth,

Fig. 1 is a central vertical section through a loom having my invention applied thereto, l5

Fig. 2 is an enlarged front elevation of a portion of the lay looking inthe direction of arrow 2, Fig. 1,

Fig. 3 is a vertical section on line 3-3 of Fig. 2,

Fig. 4 is a detail vertical section on line 4 4 20 of Fig. 2, i

Figs. 5, 6 and 7 are diagrammatic views showing different positions of the shed,

Figs. 8 and 9 are diagrammatic views showing the relation between certain/'of the jacks of the 25 dobby and the harness frames, y

Fig. l0 is an enlarged longitudinal section through the fabric, and

Fig. 11 is a perspective view showing .the relation of the hook or rod which controls the con- 30 necting warps with respect to thereed.

Referring particularly to Fig. 1, I have shown a loom frame I5 having a lay I6 mounted on swords I'I pivoted as at I8. Brackets I9 extend rearwardly from the lay and have'pivotal connection with the upper ends of links 20 ywhich move about xed pivots 2 I. The lay swords and links operate to give the lay substantially a parallel motion as it is moved back and forth by connectors 22 driven 40 by the top or crank shaft 23 of the loom.

As shown more particularly in Fig. 2 the lay is provided with a plurality of shuttle blocks 25 arranged in the present instance in two vertical tiers to'receive upper and lower shuttles 26 and 21, respectively. Racks 28 may be of the vusual construction and are reciprocated to cause lthe shuttles to move back and forth from one block to the other by means of pinions 29' which mesh adjacent blocks there may be provided amelatively narrow reed 30.

Since there are two ground webs there wi1l` ordinarily be at least four harness frames for such webs. As shown herein the top web is made of warp threads WT- which` are raised and lowered by harness frames v32T and 33T, respectively. These two harness frames reciprocate in an elevated zone of action so that part of 'thewarp threads WTpare down with respect to the upper Between 50 y shed while the remainder are raised. In a similar manner the lower warp threads WL are controlled by harness frames 34L and 35L, respectively, and

, this latter pair of harness frames moves through 5 a low zone of action so that certain of the warp threads WL are in the top of the lower shed while the remainder are in the bottom thereof. These warp threads WT and WL may be drawn from any desired source of supply' and may if desired be led around guide bars 36 and 31, respectively.

The upper and lower shuttles pass through their corresponding sheds in the usual manner and weave two webs which are designated herein as FT and FL, respectively.

As shown herein I provide other harness frames 40 and 4| cooperating with the connecting or crossing warp threads WC part of which are incorporated in one ground web while the remainder are in the other ground web. On those beats of the loom when the connecting warps are to pass from one web to the other the harness frames 48 and 4| are required to have a larger motion than the other frames, but at other times they have motions similar to the harness frames for the ground webs. These two types of motions are obtained by the use of the dobby .connections shown in Figs. 8 and 9.

I have preferred to show the harness frames as controlled by a dobby which has top and bottom pattern controlled hooks 45 and 46, respectively,

connected to jack levers 41 which rest against upper and lower cross girts 48 and 49, respectively.

In the present instance I use two harness jacks 50 and 5|, respectively, for the upper harness A frame 40. In order to' connect 4these two jacks to the frame I attach to the latter a cord 52 which passes around a. fixed sheave 53 and extends outwardly to pass around a pulley 54, from whence it goes toa xed pin or anchor 55. The pulley 54 is mounted on a. small carrier 56 the other end of which is provided with a second pulley 51. A cord 58 extends around pulley 51 and has one end attached as at 59 to jack 5| ln comparatively low position andv has the other end connected as at 68 to the jack 50 in relatively high position;

During normal running of the loom the jack is held stationary while the jack 5| moves for each beat of the loom, being out in the position shown in Fig. 8 when it is desired to have the 50 warp controlled by frame 40 in the lower part of the upper shed and being moved over to a position similar to that occupied by jack 50 in Fig. 8 when the same warp threads are to be-in the upper plane of the top shed. The parts are so proportioned that when jack 50 is stationary the pulleys and jack 5| will move the crossing warps WC so /that they will lie in both planes of the top shed, and extend rearwardly from the fell CT of the o top cloth or web. y

In similar manner the lower harness frame 4| is controlled by jacks and 66, respectively, the former of which is normally at rest in the position shown `in Fig. 9, while jack 66 moves back and 65 forth in a manner similar to the movements of jack 5|. When jack 66v moves to the position shown in Fig. 9 it will act through cord y(i1, pulleys 68 and 69`on a carrier 10 to lift harness frame 4| by'a force transmitted through a cord 1| so 70 that the crossing warps WC controlled by the lower frame will be in the top part of bottom shed, but when the jack 66 moves outwardly to a position similar to that occupied by jack 65 in Fig. 9 the same warps drop tothe bottom plane of the .'75 lower shed. When frame' 4| isto be raised to highest position, jacks 85 and 66 are both moved to the left as viewed in Fig. 9.

By the matter thus far described continued running of the loom will produce upper and lower webs independent of each other, each web being 5 formed of two sheets of warp threads one of which is divided between the harness frames which always have a restricted movement while the remainder are in one or another of the harness frames 4|| or 4|. When it is desired to move the 10 crossing warps from one to the other of the webs, the harness frames 40 and 4| will be given their full motion so that the warps of harness frame 40 for instance will move from the top plane of the top shed to the bottom plane of the lower shed, 15 while the warp threads of harness 4| will have an opposite movement and of corresponding extent. This result is achieved by moving the jacks which are normally stationary. In the case of harness 4|, for instance, as shown in F.g. 8, jack 20 50 will be moved to outer position corresponding to that for jack 5| in said figure, whereby the harness frame 40 is permitted to move to its lowest position. The fact that the point of connection 60 for the cord 58 is above the point 59 25 gives an additional motion which permits the cross warps to have movements corresponding to the heights of both top and bottom sheds plus the distance between the webs. In similar manner the normally stationary jack 65 will be moved to 30 the left from a position shown in Fig. 9 along with jack 66 so that the harness frame 4| is in its highest position.

The matter thus far described may be of cornmon construction in looms heretofore employed 35 to produce double pile fabrics. Pattern mechanism has been omitted since the same is well understood, as have also the pull-down springs that are customarily employed for the harness frames of dobby looms. 40

The shed lines shown in Fig. 5 are those which exist between those beats of the loom on which the warps WC cross from one web to the other, while Fig. 6 shows the shed lines which exist when these warps are crossed. From this last gure 45 it would be apparent that certain of the warp threads cross at point P which is behind the fells CT and CL of the upper and lower webs, respectively, a condition which as already described would interfere with correct weaving. 50

It is an important object of the present invention to provide a hook orrod 80 which can be inserted between the top and bottom sheds on crossing beats of the loom to engage the threads WC which are controlled bythe harnesses 40 and 4|. This hook moves portions of the connecting warps forwardly of the reed as at 8| so that the point Pis advanced to such a location that the split shed condition .existing in Fig. 6 is eliminated and all of the threads for the upper part of the 60 top shed are in one plane and those in the lower part of the bottom shed can lie in another plane.

It is desirable that the condition set forth diagrammatically in Fig. '7 occur only on those beats when the warps WC are to be crossed, and I will (i5 now describe the mechanism for controlling the hook or rod 80. p

Referring to Fig. 2 I have shown a hook or rod for one threadl space. A ro'd 85 movable in bearings 86 extends longitudinally of the lay and is 70 urged-to the right by a compression spring 81. Welded to the bar is a carrier plate 88 the lower end of which extends through a guide 89 on the lay. The hook 80 extends through the upper end of the carrier and is held in adjusted back and forth position by means of nuts 90. The rod extends rearwardly as at 9| and then is bent to extend parallel to the reed.

An operating lever 92 is pivoted as at 93 to the lay and has connection with a cord 94 by means of which the rod may be moved from the normal position shown in Fig. 2 to the left as indicated in dotted lines therein when it is desired to insert the hook into the shed. Cord 94 extends downwardly aroundsheaves 96 and upwardly to a part not shown, such for instance, as a multiplier or similar counting mechanism which will have an actuating movement to raise the cord periodically.

In order that the crossing warps WC may be properly controlled and slackened when they are to cross from one web to the other I provide the mechanism shown at the right of Fig. 1 comprising a lever |00 having a bar |0| under which all of the crossing warps WC pass from their beam not shown. Lever |0| is pivoted at |02and is attached to the upper end of a depending rod |03 having an adjustable stop collar |04. The rod passes through a guide plate |05 which is also positioned to engage the collar and limit downward motion of the rod, thereby affording means to vary the amount of motion on the part of bar |0| to the left from the full line position shown in Fig. 1. l

Bar |03 has a turnbuckle |06 for purposes of adjustment and is attached to anarm |01 pivoted as at |08 to xed structure. Arm |01 has a supporting nger |09 which engages a` spiral cam ||0 movable about xed axis by and with a ratchet wheel H2. The latter .is actuated by a pawl ||3 carried by a pawl lever ||I also movable about axis III and receiving an impulse through cord ||5 at regular intervals, such for instance, as every beat of -the loom.

In the position shown in 1 the spiral cam has the high part thereof under the finger |09 so that bar |0| is in its extreme right hand or rear position. As the ratchet wheel continues to be rotated, however, the Vlinger will become unsupported and fall to the low surface ||6 of the cam, thereupon permitting the bar |01 to move forwardly to the dotted line position shown in Fig. 1. lIl'his movement of bar |0| happens on the beat of the loom when the crossing warps WC are to be manipulated as described in connection with Figs. 8 and 9, and when the hook 80 is to be moved from the full to the dotted line position shown in Fig. 2 between the upper and lower webs and in line with the reed 30. The parts should be so timed that any forward motion which the hook 80 imparts to the crossing warps will permit the latter to move without undue restraint, and this result can be accomplished by having bar |0| moved forwardly either with or slightly before the forward motion of the hook.`

On the next backward stroke of the lay the cord 94 will be slackened and spring 81 move the hook 80 out of the shed.` The crossing warps will have been caught in position bythe picks of lling in the sheds which were beaten up when the hook 80 moved to theposition shown in Fig. '1. The shuttles may be provided with pull-back Y tensions to takeup any slack which may occur normal position, thereby eifecting a slowand gradual feed of the crossing warps. If `desired the low surface IIS may be formed substantially as a dwell, as shown in Fig. 1, so that ample time may be given to bind the crossed warps tightly in position before they are'subjected to any additional strain due to backward movement of the bar I0l.

A guide having upper and lower plates |20 and 5 |2| may be used as shown in Fig. 1' to prevent separation of the upper and lower webs which might -otherwise result due to the fact that the crossing warps are not taut but are slack due to the condition which will be understood by refer' 10 ence to Fig. 7.

From the foregoing it will be seen that I have provided a simple means for forming clean sheds in a double shuttle loom by requiring the crossing warps to move forwardly so that their line 15 of intersection may be in advance of the reed.

This result may be accomplished by a rod or hook which is inserted at desired intervals and in connection with a feed or slackening motion which releases the crossing warps. on' those beats when 20 they are to be advanced by the hook.

Having thus described myv invention it will be seenthat changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the inven- 25 tion and I do not wish to be limited to the details herein disclosed, but what I claim is: 4

1. In a double shuttle loom operating with two sets of ground warps to form two ground sheds for the purpose of weaving two separate webs and 30 having crossing warps to pass from one set of ground warps to the other set, a reed to beat shots of filling in the ground sheds to the fells of the webs, and means carried in Vfixed. relation with respect to and in advance of the reed to engage 35 the crossing warps and move them forwardly to a position between the webs and in advance of the fells of said webs. i,

2: In a double shuttle loom operating with two sets of ground warps to form two ground sheds for 40 the purpose of weaving two separate webs and lhaving crossing warps to pass from one set of ground warps to the other set, a lay, a reed carried by the lay to advance shots N,of lling in the ground sheds to the fells of the webs, and means supported by and in advance of the lay to engage the crossing warps on the forward beat of the lay and move said warps to positions between :the webs and in front of the fells thereof.

3. In a double shuttle loom operating with two sets of groundrwarps to form two ground sheds for the purpose of weaving two separate webs and having crossing warps to pass from one set of ground warps to the other set, a lay, a reed carried by the lay to move shots of filling in the ground sheds to the fells of the webs, means normally located to one side ofthe reed adapted for engagement with the crossing warps, and means to move the rst named means in front of the reed, therst named means thereby rendered eifective on the forward beat of the lay to engage the crossing warps and move the same to positions between the webs and in advance of the fells of said webs.

4. In a double shuttle loom operating with two sets of ground warps to form two ground sheds for the purpose of weaving two separate webs and having crossing warps to pass from one set of ground warps to the other set, a lay, a reed carried by the lay to move shotsof lling in the ground sheds to the fells of the webs, periodical- -ly acting mechanism to cause the crossing warps to move from one ground shed to the other ground y shed, and crossing warp engaging means normally locatedvto one side-of the reed but movable to a 754 moving the crossing warps to a position between i 5 the webs and in front of the felis of the webs.

5. In a double shuttle loom operating with two sets of ground warps to form two ground sheds for the purpose of weaving two separate webs and having crossing warps to pass from one set of ground warps to the other set, a lay, a reed carried by the lay to move shots of lling in the ground sheds to .the felis of the webs, a hook normally located to one side of the reed and lying outside the sheds, means -to cross the crossing warps from one ground shed to the other 'ground shed, and mechanism to move the hook in front of the reed when the crossing warps pass from one ground shed to the other ground shed, said hook.

movable into engagement with the crossing warps to move the latter to positions between and in front of the fells of the webs. 6. In a double shuttle loom operating with two sets of ground warps to form two ground sheds for the purpose of weaving two separate webs and having crossing warps to pass from one set Vof ground warps to the other set, a lay, a reed carried by the lay to move shots of filling inA the ground ysheds to the fells of the webs, means to move the crossing warps from one ground shed to the other ground shed to cause the crossing warps to intersect each other along a line behind the felis of the webs, and crossing warplengaging means normally out of. position to engage the crossing warp threads but movable into position when said crossing warps extend from one ground shed to the other to move the line of the intersection of said crossing sheds forwardly.

7. In a double shuttle loom` operating with two sets of ground warps to form'two ground sheds 40 which meet the fells of the latter and operating with a set of crossing warps, means to move the crossing warps from the fell of one web, into the shed of the other web, and crossing warp engaging means normally out,of position to engage the crossing warp and movable into crossing warp engaging position to move said crossing warps forwardly relatively to the fell from which said crossingwarps extend.

8. In a double shuttle loom operating with two sets of ground warps to form two ground sheds for the purpose of weaving two separate webs and havinglcrossing warps to pass from one set of ground warps to the other set, a lay, a reed carried by the lay to move shots of filling in the ground sheds tothe felis of the webs, means to cause the crossing warps from one shed to the other shed, means to slacken said crossingrwarps, and crossing warp engaging means normally to one side of the reed movable into crossing warp engaging position when said crossing warps are crossed and slackened, said means engaging the crossing warps to move the same forwardly relatively to the fells of the webs.

9. In a double shuttle loom operating with two sets of ground warps to form two ground sheds for the purpose of weaving two separate websand having crossing warps to pass from one set of ground warps to the other set, a lay, a reed carried by the lay to move shots of lling in the ground sheds to the fellus of the webs, crossing warp engaging means normally to one side of the reed, means to-cross the crossing warps, means to slacken the crossing warps, and mechanism to ing warps forwardly relatively to the webs.

move the first named meansinto Aengaging po sition with respect to said crossing warps on the same beat of the loom that the crossing warps are crossedand slackened, said first named means being movable forwardly to engage the crossing 5 warps and move the latter lforwardly with respect to the fells of the webs.

10. In a double shuttlerloom operating with two sets of ground warps to form two ground sheds and having a set of crossing warps to pass 10,

from the fell of one web into the shed of the other web, a reed, a lay carrying the reed, crossing warp engaging means normally out of position to engage the crossing warps, and means to cross the crossing warps from the fell of one web 15 to the shed of the other web and slacken said crossing warps and move the first named means to a position in front of the reed all on the same beat of the loom; whereby on the forward movement of the lay the warp engaging means will 20 move the crossing warps forwardly relatively to the webs.

l1. In a double shuttle loom operating with two sets of ground warps to form two ground sheds and having a set of crossing warps to pass 25 from the fell of one web into the shed of the other web, a reed, a lay carrying the reed, crossing warp engaging means normally out of position to engage the crossing warps, and means to cross the crossing warps from the fell of one web to the 30 shed of the other web and slacken said crossing warps and move the first named means to a position in front of the reed all on the same beat of the loom, whereby on the forward movement of the lay the warp engaging means will move the 35 crossing warps forwardly relatively to the webs, and means to vary the forward position of the crossing warp engaging means relatively to the reed.

12. In a double shuttle loom operating with an 40 upper set of ground warp threads to form a top web and a lower set of ground warp threads to form a bottom web, aset ofv crossing warps to pass from one ground set to the other ground set,

a reed to beat up shots of filling lying between 45 the ground warps, and means to move the crossing warps between the webs when the reed beats up the lling.

13. In a double shuttle loom, means to form top and` bottom sheds of ground warps, a reed to 50 beat up lling in both sheds, a crossing warp to extend from one shed of ground warps to the other, and means to move the 'crossing warps to a pozition in advance of the reed when the latter beats up filling in the ground sheds. 55

14. In Aa double shuttle loom weaving two spaced webs, means to Vform ashed for each web, cach shed meeting its web at the fell thereof, means to move crossing warps from one fell to the shed corresponding to the other fell, a 60 reed to beat lining into each shed, and means to be located infront of the reed to engage the crossing webs and move them to positions in front of the fells of the webs. l5. In a double shuttle loom operating with 65 an upper set of ground warp threads to form a top web and a lower set of ground warp threads to form a bottom web, a set of crossingwarps to pass from one ground set to the other ground set. a reed to beat up shots of filling lying between 70 theground w'arps, and means to move the cross- ELBRIDGE R. HOLMES. 

